The error appeared on the 20p coin due to an incorrect pairing of the old and new coin designs during the Royal Mint minting process ...

You must check your change now as you could well be sitting on a fortune. It's like this one penny coin is the "rarest in UK history" and could pocket you an eye-watering £72,000. Other bits of rare ...

A 'rare' 20p coin has sold for almost 200 times its shop value because of one subtle error. What's more, the Royal Mint suggest more are still to be found. The 2008 ...

The 20p piece, which features Queen Elizabeth II on the front and the Royal Shield of Arms on the reverse, was minted with a rare error ...

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A rare 20p coin has sold for nearly 200 times its face value after being listed on eBay. The undated coin, minted in 2008 and listed as having a 'mule error,' sold for £39.99 on Monday, January 5.